Isotopes
n. 核素；同位素（isotope的复数）
🗣️ 情景例句
Oh, I took the liberty of ordering some breakfast for you.
噢 ，我冒昧给你们订了早餐。
have you invited any friends?
你邀请朋友吗？
In another game, as the turtle swims across the oceanarium, the first porpoise swoops down from above and butts his shell with his belly.
在另一场游戏中，当海龟游过水族馆时，第一只海豚从上方猛扑下去，用腹部撞击龟壳。